The wordoriginated in India years ago and is a slang (hinglish)for chatting. Hinglish is a mixture of English and Hindi. Gupping comes from gup ang ing. Gup is chat in Hindi and gupping means chatting.
Glopping is slang for menstruation, aka having your period or being on the rag. Women often prefer this to more vulgar terminology because it can be used in public or as an inside joke.
"She is really cranky because she is glopping this week."
derivative usages:
"have a hemogloppin day".
"its Gloptoberfest in my house this week".
"next week is Gloptober".
heavy flow days may be described as "gloptastic"
To take a girl/boy away from your friend without him/her even knowing it is happening. The key is you have to do it right in front of him/her. If done behind his/her back you should search forbackstabber.
John and Brian go to a bar with Marianna and Beth. John does not like beth even though she is the one setup for him. So John begins glumping Marianna infront of Brian. At the end of the night Brian is left with Beth at the bar while John and Marianna leave together.