Having an unpleasant taste in youre mouth, mostly ment as a methaphore, but sometimes literally. It can be caused either by a feeling or an actual event.
Either way, if something gives you a bad taste in the mouth it is always bad.... really bad..
Catherinesaid: A beating from the love truncheon left a bad taste in my mouth
When the person you use the insult on is bad at wearing shoes™ but weather they are bad at wearing shoes can only be judged by an official shoe wearing judger and these can only be appointed by the CEO, founder and revolutionary of your bad at wearing shoes™ - JT and what he says goes. Use this insult with caution as it can lead to depression and suicide as it is such a destructive insult but if used inpropererly can end in a law suit by the recipient of the insult
Hey (insert name) you fatty your bad at wearing shoes
"Mad applause and screaming after (insert name) falls on the floorcrying and devastated"