Bloodsucker/ˈblʌdsʌkər/ Definition 1 of 2Pro Tip 1/3Literal Meaning Used to describe real creatures that drink blood for survival. During the hike, we were swarmed by bloodsuckers like mosquitoes. Pro Tip 2/3Negative Emotion Invokes a sense of discomfort or disgust, often used to emphasize annoyance. Don't go by the lake, it's filled with bloodsuckers this time of year. Pro Tip 3/3Not Humans Refers to non-human species, although used metaphorically for people sometimes. The documentary showed how bloodsuckers are vital to the ecosystem.