A theatrical production that is so
lacking in
merit that it causes the viewer to remove his/her
bum (posterior) from the seat; a poor performance.
'I tried my very best to sit through The Vagina Monologues, but after half an hour of that
cunt speaking I fell asleep. What a bummer'.
'So lacklustre was his performance that to call the production a bummer would be generous'.
'The transexual production of Puss in
Boots didn't last until the second act; a bummer by
definition'.