Portfolio grid excerpt and :before class question

Morning,

I’ve used this code to tweak the portfolio grid and all is good.

.image-overlay {
    display: none !important;
}
.grid-image:before {
    content: attr(title);
    background: red;
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 1000;
    text-align: center;
    line-height: 180px;
    opacity: 0;
    font-weight: bold;
    font-size: 24px;
}

.grid-image:hover:before {
    opacity: 1;
}

.grid-image:before{
    transition: all linear 0.2s;
}

Is it possible to also display the portfolio excerpt?

I tried content: attr(excerpt); but that didn’t work

Thanks

TJ