Not anything sexual... just a dog in a bath tub

A regift. A relatively trivial object that has repeatedly been given as a present. Strictly, a mathom is probably NOT an object with a tendency to decay (i.e. fruitcake), nor an object of obviously poor construction (i.e. a crooked handmade sweater or junk), nor a family heirloom or a useful "hand-me-down" article (i.e. toddler clothing), nor one which requires expensive upkeep (i.e. a large, exotic pet -- a proveribial white elephant).
Such objects most likely persist because they are slightly too valuable or unusual to dispose of outright or give to Goodwill, yet have such limited use or appeal that few wish to retain them. Modern-day candidates for mathomhood are commonly visible in catalogs for novelty electronics, pop art, junk jewelry, and sports memorabilia, as well as in roadside "local" gift stores.

An unfortunate Acronym is an acronym for an organisation or person that results in a word that is rude, disgusting or totally inappropriate. A typical example would be the Country and Urban Nature Trail Society which was intended to promote pleasant nature walks in both the town and countryside. It never got off the ground because the acronym was CUNTS. Another British example is Radical Alternatives to Prison, a bunch of bleeding hearts who want to abolish prisons. They were originally going to be called Completely Radical Alternatives to Prison – CRAP, but decided against this, perhaps it was too close to the truth about their ideas.
One unfortunate acronym which is still currently used is TWAT which stands for The War Against Terrorism, while from the United States comes FLOTUS which identifies the President’s wife and stands for First Lady Of The United States. It’s an unfortunate acronym in that it sounds as if it is something unpleasant lurking in a toilet bowl. I suppose they could try removing some of the unimportant letters, but FLOUS and FLUS don’t sound much better.

means fuck you...enuff said

(n) Opposite of smartphone. A cellphone which has little or no advanced features such as a large, bright screen, or applications such as Email and Web browsing.

something you say when somebody is acting disconnected from the real-life world

A meme that has become irrelevant or unfunny, often due to age or overly cringeworthy use.

A Dead Meme does not have to be old; many people still continue to make Shrek jokes despite the many years since original thread.

Often times a Dead Meme can be revived, if only self-referential, or satirical. If not, it can be considered quite annoying for a Dead Meme to be used.