A leg is a person who you like but don't know their
name. Jackleg is the same but a person who you don't like and don't know their
name. Also, legfest - more than 3 people working together that you don't know any of there names.
Construction
job lingo of meeting a lot of people that you can't remember their names
1.)
Hey leg do you mind giving me a
hand to move this
pipe.
2.) Do you know that jackleg over there helping us out.
3.) What's up legs, looks like a legfest going on.