The Collaborative International Dictionary
Shot-clog
Shot-clog \Shot"-clog`\, n. A person tolerated only because he pays the shot, or reckoning, for the rest of the company, otherwise a mere clog on them. [Old Slang]
Thou common shot-clog, gull of all companies.
--Chapman.
Wiktionary
shot-clog
n. (context obsolete slang English) One who is tolerated only because he pays the shot, or reckoning, for the rest of the company, otherwise a mere clog on them.