Used in the same way as 'tooting your own
horn', except in this instance it doesn't make you look
good. Tooting your own vuvuzela results in making yourself look
annoying.
1. She tried to
toot her own
horn about how much she reads, but ended up tooting her own vuvuzela when she revealed she was reading
Twilight!
2. Don't be caught tooting your own vuvuzela lest you appear douche-y