Heavy-up is an advertising term referring to a high concentration of advertising for a short period of time in a media schedule. If an advertiser's product is more likely to be used at one specific time than at another, the advertiser may choose to heavy-up the advertising for that time period. For example, a candy manufacturer may opt for heavy-up advertising during the two weeks prior to Halloween.
Heavy-up also refers to a relatively large or complex electrical job where a master electrician or similar is required to perform the installation or certify an installation.
Definition: Heavy Up is one of those peculiar, specialized terms in the world of home renovation and electrical systems. Essentially, it means to increase the current coming into your house, so that your electrical system can handle today's appliances, lights, computers, TV's, etc. A typical heavy-up is one in which an older house needs to be upgraded to 200 amp service, which is the standard now.
A heavy up is a fairly major undertaking, requiring the services of a licensed electrician, since it entails replacement of the entire service panel.