This untidy and irresponsible drunk really is shameless; staggering about Chatsworth, leaving a trail of destruction, empty cans and insulted residents wherever he goes.
It's fair to say that there's no one quite like the patriarch of the Gallagher family.
A proud father of... erm... many, a philosopher, and a professional drunk, Frank is also a one-time bigamist, marrying both Monica and Sheila Gallagher - the latter only to get his hands on her benefits.
Keeping it all neatly in the family, he also slept with Sheila's daughter Karen in the early days.
Frank has faked his own death and been presumed dead on several occasions, and although despite his dangerous levels of alcohol intake, Frank is very much alive.
Regardless of his flaws, Frank loves his family very much, stepping in to protect them from trouble when it matters most.
Despite his, albeit warped, sense of family values, Frank's successes in marriage are chequered. Both long-suffering Monica and love-of-his-life Libby leave him due to various irreconcilable differences.
But, thanks to moments of kindness and drunken profundity, Frank stays in favour and remains a loveable rogue with an unpredictability that keeps everyone guessing.