The standard idiom is “toe the line,” meaning to do what is expected or required. “Tow the line” is a common spelling error caused by the homophones toe and tow.
ReviewedEvidence1 sourceSectionPhrases & Idioms
Quick answer
Use “toe the line”: “Employees are expected to toe the line.”
Key details
Canonical Formtoe the line
Common Errortow the line
Core Meaningto follow rules, orders, or expected standards
Variants
toe the line
Dictionary-listed standard idiom.
tow the line
Not the standard idiom for obeying rules.
Further guidance
Correct Form
Cambridge records “toe the line” as the idiom.
History Boundary
This guide does not claim a single exact first-use date or origin story.
Word Boundary
“Tow” means pull something; it is not the word used in the standard idiom.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
The established expression is “bad rap,” referring to severe criticism, an unfavorable judgment, or an unfair accusation depending on context. “Bad wrap” is not the standard spelling of that expression; “wrap” has its own unrelated meanings.
The established expression is “with bated breath,” used for waiting in an anxious or excited way. Cambridge records “bated” in this fixed phrase. “Baited breath” is a sound-based spelling confusion, not the form supported by the reviewed dictionary evidence.
The established expression is “at someone’s beck and call,” meaning ready and willing to do whatever that person asks. “Beckon call” is a common mishearing or eggcorn, not the standard form of the idiom.
“Bottom line” can mean the final profit-or-loss result in accounts or, figuratively, the most important fact or final result. The guide stays with current documented meaning and does not add unsupported origin chronology.
“Champing at the bit” and “chomping at the bit” are both used for being very eager or impatient to begin. Cambridge explicitly records champing/chomping as variants; “champing” reflects the older horse-related wording, while “chomping” is a widely accepted modern variant.
“Couldn’t care less” means not caring at all and is the clearest form across English varieties. Cambridge also records “could care less” as a US informal variant used with the same intended meaning, despite its literal wording appearing logically opposite.
The established adjective is “deep-seated,” meaning strongly rooted, firmly established, or difficult to change. “Deep-seeded” is a common reinterpretation when this meaning is intended, even though a literal seeded construction can occur in unrelated contexts.
