present participle of jam on the brakes

Third-person singular simple present indicative form of catch on fire

Doing manual labour as a tradesperson, as opposed to being a foreman, business owner, etc., in the industry.

simple past tense and past participle of sit in on

simple past tense and past participle of knock on heaven's door

simple past tense of take on the chin

(informal) To impose significant difficulty on.

To waste energy on a pointless task. / (chess) Of a bishop or queen: to face a diagonal occupied by two or more opposing pawns.

Third-person singular simple present indicative form of laugh on the other side of one's face

(dated, informal, Britain) bought with an agreement to pay later