One that sucks, especially an unweaned domestic animal. 2. Informal. a. One who is easily deceived; a dupe. b. One that is indiscriminately attracted to something specified: I'm always a sucker for a good crime drama. 3. Slang. a. An unspecified thing. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.