look up any word, like the eiffel tower:
When a person unexpectedly sends you a picture of their penis /or naked body. Especially true when you have not said or done anything to encourage the sharing of nudity .
I met this guy online and two emails in I said here's a picture of me at Orlando and the nest thing I know *BAM* Ambush Penis. So that was the end of that.
by Briesie March 09, 2011