(verb) to renege on plans, often without telling others involved in the
plan. Similar to standing someone up, but not usually used romantically or in a
dating situation.
>
Lynn, Julie and I went to Tapa's last night; we had a great
time
>>Wasn't Lisa supposed to meet you out too?
>Yea, she never showed up! She didn't call or anything; she totally japped.
-OR-
>Mom, you
said you would come in to help me today. I can't believe you are japping on me AGAIN!