This is my mothers word, it means to be nosey, pushy and a general pain in the ass. It sometimes means having an attitude the size of montana on your shoulders and projecting that all over the place. Generally this is not a nice thing but can be used in a nice context.
Lasso is a product by OmniPilot. Currently its at version 8. It is a language, an application server, a dessert topping, AND a floor wax! It allows for a webserver to poll a database and then to return the results of that poll to a webpage. And that's just the tip of the iceberg as far as Lasso is concerned.