Third-person singular simple present indicative form of top one's boom

To depart quickly.

(informal) Performing as well as one can.

Alternative form of at the top of one's game

(idiomatic, informal) The affluent part of a community.

plural of open-top bus

(UK) A double-deck bus with an open, or partially open, top deck.

(adjectival) In an exhaustive and pervasive manner. / (adverbial) In the manner of conducting a remedy, search, or investigation (etc.) that is thorough and complete.

To take it from scratch, to take it from the beginning.

Trousers that are wide and baggy at the top and taper down the legs to a close-fitting hem at the ankle.