Sexual intercourse that takes place up
against a wall, usually
furtive. Most often takes place due to not being able to share a bedroom with one's love when visiting family for the holidays, because of strict parental
guidelines, regardless of one's age.
While everyone was in the
dining room feasting on the Christmas goose, Mark and Christine snuck around the corner by
the den for a
wallbanger before dessert arrived on the table.