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