你舊前侌

What does this mean in Cantonese? I believe it means something like, "You are old," but does it have another colloquial meaning, like, " you're boring", "you're a fool", "your time has past", "you are no longer good looking" or "you are lame"?
Pasted onto a picture of a teacher in class was, "你舊前侌|".
by Gweilo Wizard October 12, 2017
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