Pretending to be on your cell phone in order to avoid conversation or akward situations. Faux meaning fake and almost rhyming with phone makes this phrase kick ass.

A casual invitation / threat used by an individual that is not afraid of fucking someone up.

When waiting in a large crowd to meet someone for a first date, one must not seem too interested. In order to disguise one's anticipation, one fiddles with their cell phone pretending to have recieved either a text message or phone call as the other approaches; thus making the initial hello slightly less awkward and far more nonchalant.

A fake phone call you take on your cell phone when either a.) you see someone coming you don't want to talk to, or b.) you want to end a conversation abruptly.