drop into

drop in(to) (something)

1. To let go of something so that it enters something else. In this usage, a noun or pronoun can be used between "drop" and "in" or "into." Oh, I just dropped my donation into the box outside.
2. To fall into something. Sean positioned himself so that the fly ball just dropped into his glove.
See also: drop
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

drop someone or something into something

 and drop someone or something in
to let someone or something fall into something. He dropped a quarter into the slot and waited for something to happen. He dropped in a quarter. Johnny Green dropped a cat into a well He went to the well and dropped a coin in.
See also: drop
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
See also:
References in periodicals archive ?
Michelle Fine, "Why Urban Adolescents Drop into and out of Public High School," in Gary Natriello (ed.), School Dropouts: Patterns and Policies (New York, 1987), pp.
#1 must drop into the lane to provide assistance where needed, while continuing to match up with his man and watching where the offensive men are spotting up for the skip pass.