simple past tense and past participle of belly up

Third-person singular simple present indicative form of belly up

present participle of belly up

(informal, intransitive) To become more relaxed or less demanding. / (informal, intransitive) To reduce one's speed.

(transitive) To phone; to contact by telephone. / (transitive) To order by telephone.

(snooker, transitive, intransitive, billiards, cue sports) to arrange in a rack / (idiomatic) to gain (points etc.; in a game or sport), to accumulate / (idiomatic) to acquire, to gather together.

present participle of muscle up

An exercise done for strengthening the arms and upper body, in which one lifts one's own weight while hanging from a bar to a position above the bar.

Third-person singular simple present indicative form of muscle up

(transitive, intransitive) To train the muscles for increased size and strength. / (intransitive) To force one's way into or through.