He says he's afraid he'll pass out on the
BUS and someone will harvest his organs.
The Big Bang Theory Season 1, Episode 11
But I don't drive
and I can't take the BUS.
The Big Bang Theory Season 2, Episode 5
'Cause it's like taking
your driver's test in a BUS.
The Big Bang Theory Season 9, Episode 10
Oh... can't you take
the BUS to the dentist?
The Big Bang Theory Season 5, Episode 15
But just to be clear, you mean a party BUS
with booze and music, right?
The Big Bang Theory Season 9, Episode 13