Any form of love related touching. Such as hand holding, heads on other shoulders, hug holding, walking with arms around others, etc.
Please refrain from pluxing during the ride.

They ditched thier friends to go plux with eachother.

The girl coughed and said "plux!" under her breath to alert her friends of ther pluxing couple ahead.
by Handso Meknight June 05, 2010
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Nickname of the square, the Place du Luxembourg (known as Luxemburgplein in Dutch) in the Belgian capital of Brussels.
There was a protest in the P-Lux last Saturday
by 8510pm December 20, 2012
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