1. To go into some place very briefly. I need to pop into my professor's office to drop off the assignment. Dan just popped into the butcher for some hamburger meat.
2. To put or toss something into something else very quickly, casually, or suddenly. In this usage, a noun or pronoun can be used between "pop" and "into." He popped a mint into his mouth, hopeful that he might get a kiss at the end of the date. Can you pop this letter into the mailbox for me when you go out later?
pop something into somethingand pop something in
to fit, snap, or press something into place in something. Lee popped the lever into place, and the machine began to function. Lee popped in the plastic part, and the toy ran beautifully.
1. To visit some place briefly: I'm going to pop into the store for a moment.
2. To put or throw something into something suddenly: He watched the movie while popping marshmallows into his mouth. She popped the DVD into the player.