A bit of hair that grows under the cheeks and next to, but separated from, the moustache.
Found on people who have yet to develop a full face of hair, or who naturally have patchy beard growth.
1.
Premise: The men upstairs are disrupting my sleep.
Premise: Any man who disrupts my sleep is a mouche-rocket.
Conclusion: The men upstairs are mouche-rockets.
2.
Ross, Nate, or *Akhtar.
*The grand pooh-ba of mouche-rockets, a logic teacher.