Gladhands are coupling devices used to connect the service and emergency air lines from a truck or tractor ("semi") to a trailer.
The truck driver connected the air lines to the trailer by pressing the gladhands together and rotating one 90 degrees to secure the connection.
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug