Slang for showing off or boasting, borrowed directly from English "fronting"
Encoding Strategies:
linguistic

front
to front / show off
+
-ear
verb suffix
Frontear comes from the English slang "fronting0," as in "putting up a front0" — a false or exaggerated display of status.
frontear
to front, to show off, to brag, to boast
To put up a false or exaggerated display of wealth, status, or confidence.
Siempre está fronteando con ropa cara que ni siquiera es suyaHe's always fronting with expensive clothes that aren't even his
Pero en bajita, ella no es de frontearBut on the low, she doesn't like to front