slang An involuntary erection that a man achieves during sleep and retains upon awakening. I rolled over to snuggle my boyfriend, only to bump off of his morning missile. I hate waking up with both a morning missile and an urgent need to pee!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
See morning glory
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.