It's when a guy finishes in a girl's eyelashes
I gave her a Mexican Butterfly for her birthday
by Fatsquirrel March 19, 2013
EW! that mexican butterfly almost touched me!
by df5ggg545 August 25, 2008
When you "finish" in a girl's eyelashes
Yeah, he gave me the Mexican Butterfly, but I secretly liked it.
by AustinSmith53 October 26, 2015