pitch forwardvi phrasalphrasal verb, intransitive: Verb with adverb(s) or preposition(s), having special meaning and not taking direct object--for example, "make up" [=reconcile]: "After they fought, they made up."
(lurch or tip towards the front)
前倾,向前倾,向前倾斜
The passengers all pitched forward when the bus braked very suddenly.