
Oh, my God, you ran over a HOBO.
The Big Bang Theory Season 4, Episode 4

Instead of a world-class physicist,
I could've wound up as a HOBO...
The Big Bang Theory Season 6, Episode 22

...but I recently adopted a HOBO lifestyle...
The Big Bang Theory Season 8, Episode 1

All right, I'd kill a HOBO if it would
get me laid. Now, can we order?
The Big Bang Theory Season 3, Episode 13

...and your best decision is
to ride the rails like a HOBO?
The Big Bang Theory Season 8, Episode 1